Here I would like to propose another possibility, namely that quantum theory will make more sense when regarded as part of a theory of spacetime. Furthermore, I claim that we can only see this from a category-theoretic perspective — in particular, one that de-emphasizes the primary role of the category of sets and functions.

— Quantum Quandaries: A Category-Theoretic Perspective, John C. Baez

2010.02.23 Tuesday ACHK